The issue reported previously - Uncaught TypeError: Cannot read properties of null (reading 'className') - is still present if setting the <compilation debug=”true”> in the web.config and EnableScriptCombine="false" in the ScriptManager.

Workaround - Toggle drop zone visibility or enable/disable it, using AsyncUpload OnClientFileUploaded and OnClientFileUploadRemoved events:

<div class="dropfile" style="height: 20px; width: 120px; background-color: red; display: block">
</div>
<telerik:RadAsyncUpload ID="fimFileImport" runat="server" DropZones=".dropfile" MaxFileInputsCount="1"
	RenderMode="Lightweight" OnClientFileUploaded="OnClientFileUploaded" OnClientFileUploadRemoved="OnClientFileUploadRemoved" >
</telerik:RadAsyncUpload>

<script type="text/javascript">
	function OnClientFileUploaded(sender, args) {

		var maxFileCount = sender.get_maxFileCount();
		var uploadedFilesLength = sender.getUploadedFiles().length;
		
		if (maxFileCount === uploadedFilesLength) {
			$telerik.$('.dropfile').hide();
		}
	}

	function OnClientFileUploadRemoved(sender, args) {

		var maxFileCount = sender.get_maxFileCount();
		var uploadedFilesLength = sender.getUploadedFiles().length;

		if (maxFileCount > uploadedFilesLength) {
			$telerik.$('.dropfile').show();
		}
	}
</script>

Accessibility Management Platform (AMP) reports that the Telerik Web Forms ComboBox has an attribute mismatch

This element has a mismatch between the value of its readonly and aria-readonly attributes

The following structure replicates the error

<telerik:RadComboBox ID="RadComboBox1" runat="server" EmptyMessage="Empty Message" EnableAriaSupport="true">
    <Items>
        <telerik:RadComboBoxItem Text="Item 1" />
        <telerik:RadComboBoxItem Text="Item 2" />
        <telerik:RadComboBoxItem Text="Item 3" />
        <telerik:RadComboBoxItem Text="Item 4" />
    </Items>
</telerik:RadComboBox>

Noticed that when using a template to custom define the pager look, the pager gets rendered in a TD and not a TH as expected since the pager is in a THEAD.  Could the header pager only be modified to render in TH?  This would allow all elements in the header to render the same and help with styling.

While trying to update to latest version of Telerik ASP.Net Ajax, we are getting following exception:

Click here for more details

An error occurred while running the wizard.

Error executing custom action Telerik.Web.UI.VSX.Actions.MultiProjectUpdateReferencesAction: System.Runtime.InteropServices.COMException (0x80004005): This reference cannot be removed from the project because it is always referenced by the compiler.
   at VSLangProj.Reference.Remove()
   at Telerik.VSX.Internal.VisualStudio.VisualStudioThreadHelper.<>c__DisplayClass0_0.<<RunInMainThread>b__0>d.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.VisualStudio.Threading.JoinableTask.CompleteOnCurrentThread()
   at Telerik.VSX.Internal.VisualStudio.VisualStudioThreadHelper.RunInMainThread(Action action)
   at Telerik.VSX.ProjectConfigurators.ApplicationReferenceManager.RemoveReferences()
   at Telerik.VSX.ProjectConfigurators.ApplicationReferenceManager.UpdateReferences()
   at Telerik.VSX.Actions.UpdateReferencesAction.UpdateReferences(IProjectWrapUIComponents projectWrap)
   at Telerik.VSX.Actions.MultiProjectActionBase`1.Execute(WizardContext wizardContext, IPropertyDataDictionary arguments)
   at Telerik.VSX.Actions.MultiProjectUpdateReferencesActionBase`1.Execute(WizardContext wizardContext, IPropertyDataDictionary arguments)
   at Telerik.VSX.WizardEngine.ActionManager.ExecActions()

I would request to have the upgrade wizard handle it and show a graceful message instead of throwing the exception as it is doing right now.

Dear Telerik Support.  I found another bug related to this one below.

https://feedback.telerik.com/aspnet-ajax/1688270-uncaught-typeerror-cannot-read-properties-of-null-reading-classname?_gl=1*iuxa0l*_gcl_au*NjcwNTkzNi4xNzQ3Njc4MzQz*_ga*OTAxNzk1OTc4LjE3Mzk4MjI5NzY.*_ga_9JSNBCSF54*czE3NDgwOTkxODEkbzIxJGcxJHQxNzQ4MDk5NTIzJGo1NCRsMCRoMCRkRlJROUp0Q0RDUUZTUlZUeFlLLU9ja3RBc2UwczF3ZU55Zw..

This line of code also causes the same issue.

$find("txtYear").clear();

See attached Console debug output.

It is my opinion that a hot fix needs to be done asap!  The work around that Derek posted on May 23rd falls short of the bigger issue.  This is a serious matter and needs to be addressed immediately.

"Loading..." text in Combobox with Virtual Scrolling is visible on first set of items loading.
It shows first time "Loading..." text. on scrolling it loads items from PageMethods/WebService but "Loading..." text it not visible i.e. because it is first <LI> item so it is not visible.

Instead of first <LI> item, it  should be at position where it always display while loading more items.

same issue is also in telerik demo website : http://demos.telerik.com/aspnet-ajax/combobox/examples/populatingwithdata/autocompletesql/defaultcs.aspx

RadMultiselect control has ClearButton property which should enable displaying the button for clearing all the selected options...

However, eventhough I have this property turned on I don't see any button for clearing the values...  I can only go to the "expected" position for the button and then my mouse cursor is changed and after clicking all the values are cleared as expected... 

In version 2025 Q2, I am getting the following error message when opening the RadGrid in design mode: 

System.NullReferenceException: Object reference not set to an instance of an object. at Telerik.Web.UI.Licensing.TelerikLicense.get_CurrentHost() at Telerik.Web.UI.Licensing.TelerikLicense.get_IsLicenseValid() at Telerik.Web.UI.RadGrid.Render(HtmlTextWriter writer) at System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) at System.Web.UI.Design.ControlDesigner.GetDesignTimeHtml()

Business Need - User Story Terminology:

As a Telerik Support Specialist, I would like our programmers to incorporate new code which will treat hyphens as if it were a space upon ExportToPdf() so that we gracefully handle for scenarios where a very long word with a hyphen will wrap to the next line instead of overlapping other content.

RadGrid.MasterTableView.ExportToPdf() - we would like telerik to update logic to do a normal word wrap when a hyphen exists rather than not wrapping when there's not enough room in the grid cell | View Ticket | Your Account

Hi,

In the Glow Theme the Filter Input Box is not visible.

https://demos.telerik.com/aspnet-ajax/grid/examples/functionality/filtering/basic-filtering/defaultcs.aspx

Regards,
Jamil

When AjaxManager and CompareValidator are both placed on the same Page, the RadButton as the DefaultButton for the Panel does not make a Postback if hitting the Enter key while the focus is on the TextBox.

Code to replicate the problem:

<telerik:RadAjaxManager ID="RadAjaxManager1" runat="server" />

<table>
    <asp:Panel ID="Panel1" runat="server" DefaultButton="btnSearch">
        <tr>
            <td>
                <telerik:RadTextBox ID="txtSearch" runat="server" MaxLength="25" Width="100%" InputType="Number"></telerik:RadTextBox>

                <asp:CompareValidator ID="cmpDataType" runat="server" ControlToValidate="txtSearch" Operator="DataTypeCheck" Type="Integer" Display="Dynamic" Text="Value must be integer" ValidationGroup="SearchGroup">
                </asp:CompareValidator>

                <telerik:RadButton ID="btnSearch" runat="server" Text="Search" Primary="true" OnClick="btnSearch_Click" UseSubmitBehavior="true" ValidationGroup="SearchGroup">
                </telerik:RadButton>

                <%--<asp:Button ID="btnSearch" runat="server" Text="Search" OnClick="btnSearch_Click" />--%>
            </td>
        </tr>
    </asp:Panel>
</table>

C# - Code to display the message when the button successfully performs the PostBack on Enter.

protected void btnSearch_Click(object sender, EventArgs e)
{
    Response.Write("Search button clicked!");
}

The behavior works fine with a regular ASP Button.

Slideshow rendering messed up in Chrome. After any slide comes in a segment the right side is corrupted as shown in the attached image.

The bug is reproduced if you set the animation to loop and fire the play button. After that leave the slider to work non-stop for 10-15 minutes and you'll see the corrupted rendering.

Here is some test code:
  <telerik:RadImageGallery  ID="RadImageGallery1" Width="100%" LoopItems="true" 
                                    ImagesFolderPath="slides" runat="server" DisplayAreaMode="Image" Height="450px">
                                    <ClientSettings>
                                        <AnimationSettings   SlideshowSlideDuration="6000">
                                            <NextImagesAnimation Type="Random" Easing="Random"  Speed="3000" />
                                            <PrevImagesAnimation Type="Random" Easing="Random" Speed="3000" />
                                        </AnimationSettings>
                                    </ClientSettings>
                                    <ThumbnailsAreaSettings Position="Left" Width="0" Mode="ImageSlider" ScrollOrientation="Vertical" />
                                    <ImageAreaSettings ShowDescriptionBox="false" NavigationMode="Zone" Height="100%" />
 </telerik:RadImageGallery>